CNRFC - Hydrology - Observed River/Reservoir Conditions

TRINITY RIVER - HOOPA (HOOC1)

Latitude: 41.05º N	Longitude: 123.68º W	Elevation: 333 Feet
Location: Humboldt County in California		River Group: North Coast

Monitor Stage: 44.0 Feet

Flood Stage: 48.0 Feet

Observed Data Credit
	Raw streamflow data is provided by the US Geological Survey (USGS). View USGS Data for this station location.

Historical Stage/Flow Data
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2021*	13,300	19.67	Feb 16, 2021
2020*	25,100	23.65	Jan 26, 2020
2019*	88,100	36.31	Feb 27, 2019
2018*	39,800	26.87	Apr 7, 2018
2017*	83,600	35.55	Feb 9, 2017
Historical High Stage/Flow Events (Period of Record - Oct 1931 to Present)** - Ranked by Flow
1965*	231,000	57.00	Dec 22, 1964
1956	190,000	36.90	Dec 22, 1955
1974*	145,000	45.98	Jan 16, 1974
1983*	122,000	43.16	Jan 27, 1983
1997*	122,000	42.97	Jan 01, 1997
1986*	116,000	42.43	Feb 18, 1986
* Discharge affected by regulation or diversion
** Most recent continuous record back to Oct 1931 with segmented periods back to Oct 1911

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ105)

Tonight: Mostly cloudy until late tonight then becoming partly cloudy. Chance of rain showers, snow showers and slight chance of thunderstorms in the evening, then slight chance of rain showers and snow showers overnight. Some thunderstorms may produce small hail in the evening. Snow level 1000 to 1500 feet. Lows 22 to 32.

Friday: Partly cloudy. Widespread frost and patchy valley fog in the morning. Highs 34 to 49.

Friday Night: Partly cloudy in the evening then becoming mostly cloudy. Lows 25 to 35.

Saturday: Mostly cloudy. Rain showers, snow showers likely and slight chance of thunderstorms. Snow level 1500 feet rising to 2500 feet in the afternoon. Highs 40 to 55. Southeast wind around 20 mph.

Saturday Night: Rain showers, snow showers and slight chance of thunderstorms. Snow level 2500 to 3000 feet. Lows 31 to 41.

Sunday: Rain showers and snow showers. Snow level 2500 feet rising to 3500 feet in the afternoon. Highs 40 to 55.

Sunday Night: Mostly cloudy. Chance of rain showers and snow showers. Lows 29 to 39.

Monday: Mostly cloudy in the morning then becoming mostly sunny. Slight chance of rain showers and snow showers. Highs 41 to 56.

Monday Night: Partly cloudy. Lows 25 to 35.

Tuesday: Sunny. Widespread frost. Highs 41 to 56.

Tuesday Night and Wednesday: Mostly clear. Lows 24 to 34. Highs 42 to 57.

Wednesday Night: Partly cloudy. Slight chance of rain showers and snow showers. Lows 27 to 37.

Thursday: Mostly cloudy. Chance of rain showers and snow showers. Highs 41 to 56.

Impacts - E19 Information
44.0 Feet	Minor flooding of the lowest lying areas may occur.
46.0 Feet	Flooding of many low-lying areas near the river is likely. Minor flooding may occur over Highway 96 between Willow Creek and Hoopa.
48.0 Feet	Considerable flooding of low-lying areas adjacent to the river including Highway 96 is likely. Significant damage to structures in these areas is possible.
51.0 Feet	Extensive flooding of all low-lying areas adjacent to the river including Highway 96 both north and south of Hoopa is likely. Significant damage to structures in these areas is possible.
53.0 Feet	Extensive flooding of all low-lying areas adjacent to the river, including Highway 96 north and south of Hoopa. Significant damage to structures in these areas likely.
55.0 Feet	Extensive and severe flooding between Willow Creek and Weitchpec and flooding of many homes and businesses in the valley areas. Expect closure of Highway 96 between Willow Creek and Weitchpec.
57.0 Feet	Severe flooding of roads, bridges and structures in and around low areas of the river. Many road closures are likely including Highway 96 at several locations between Willow Creek and Weitchpec. Many homes and businesses in valley areas will be inundated.

Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS Eureka Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.

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